Polar Angle Dependence of interfacial Dzyaloshinskii-Moriya Interaction

POSTER

Abstract

The broken inversion symmetry combined with large spin-orbit coupling at the interface between heavy metal and ferromagnet gives rise to the antisymmetric exchange interaction, namely the interfacial Dzyaloshinskii-Moriya (iDM) interaction [1, 2]. In the presence of iDM interaction, spin-wave amplitudes and frequencies become asymmetric with respect to the spin-wave propagation direction [3]. In this work, we investigate the angular dependence of iDM interaction using Brillouin Light Scattering (BLS) [4]. We found that the magnitude of iDM shows weak polar angle dependence in Pt/Co/MgO structure. The magnitude of iDM is smaller when the magnetization is perpendicular than the magnetization is in-plane.
References [1] I. E. Dzyaloshinskii, Sov. Phys. JETP 5, 1259 (1957). [2] T. Moriya, Phys. Rev. 120, 91 (1960). [3] J. H. Moon, et al. Phys. Rev. B 88, 184404 (2013). [4] J. H. Cho, et al. Nat. Comm. 6, 7635 (2015).

Presenters

  • Woo-Yeong Kim

    • Department of Materials Science and Engineering, Korea University

Authors

  • Woo-Yeong Kim

    • Department of Materials Science and Engineering, Korea University

  • Hyung-Keun Gweon

    • Department of Materials Science and Engineering, Korea University

  • Dae-Yun Kim

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Hyeok-Cheol Choi

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Min-ho Park

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Yong-Keun Park

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Sang-Ho Lim

    • Department of Materials Science and Engineering, Korea University

  • Sug-Bong Choe

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Chun-Yeol You

    • Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology
    • Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology
    • Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology (DGIST)

  • Kyung-Jin Lee

    • Materials Science and Engineering, Korea University
    • Department of Materials Science & Engineering, Korea University
    • Korea University
    • Department of Materials Science and Engineering, Korea University